6347
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6936
- Proper Divisor Sum (Aliquot Sum)
- 589
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5760
- Möbius Function
- 1
- Radical
- 6347
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 36
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Numbers that are the sum of 5 positive 6th powers.at n=34A003361
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 79.at n=13A031577
- Decimal concatenation of n-th lucky number and n-th prime number.at n=14A032604
- Numbers ending with '7' that are the difference of two positive cubes.at n=33A038862
- Number of connected 3 X n binary matrices (divided by 2).at n=4A054419
- Numbers n such that sigma(n)^2 - phi(n)^2 is a perfect square.at n=23A057654
- Numbers n such that n and prime(n) end with the same three digits.at n=4A067841
- Numbers n such that n and the n-th prime have the same digits.at n=9A074350
- a(n) = 3*n^2 - 1.at n=45A080663
- Least number that ends an arithmetic progression of n numbers with the same prime signature.at n=12A087309
- Least number that ends an arithmetic progression of n numbers with the same number of divisors.at n=12A090548
- Row sums of triangle A093628, in which the diagonals are equal to the Euler transform of the rows.at n=13A093629
- Smallest semiprime (A001358) which is at the end of an arithmetic progression of n semiprimes.at n=12A096003
- Triangle read by rows: number of labeled partitions of n with maximin m.at n=48A113547
- a(n) = 9*n^2 - 8*n + 2.at n=27A154254
- a(n) = 529*n - 1.at n=11A158365
- a(n) = 12*n^2 - 1.at n=23A158463
- First differences of A163891.at n=27A163893
- Partial sums of A006864.at n=10A180488
- a(n) = numerator(H(n+2)-H(n-1)), where H(n) = Sum_{k=1..n} 1/k is the n-th harmonic number.at n=44A188386